(2)
In a tabular form
Under S/N
1, 2, 3, 4, 5
Under ACi/cm
7.20, 7.80, 8.10, 8.70, 9.30
Under BCi/cm
2.10, 3.70, 4.30, 5.30, 6.30
Under titai(Φ)
68.0, 48.0, 38.0, 28.0, 20.0
Under U = BC/AC
0.2917, 0.4744, 0.5309, 0.6092, 0.6774
Under cos tita(Φ)
0.3746, 0.6691, 0.7880, 0.8829, 0.9397
(2av)
(i) I would avoid error due to parallax.
(ii) I would ensure right position of ruler while taking readings.
(2bi)
Principal axis is an imaginary line passing through the center of the lens in which the principal force of the lens passes through.
(3a)
R ohms
R1 = 1ohms R3 = 3ohms
R2 = 2ohms R4 = 4ohms
R5 = 5ohms
V1 = 1.90v
V2 = 2.15v
V3 = 2.3v
V4 = 2.40v
V5 = 2.5v
In a tabular form
Under S/N
1, 2, 3, 4, 5
Under R(ohms )
1.00, 2.00, 3.00, 4.00, 5.00
Under V(v)
1.90, 2.15, 2.30, 2.40, 2.50
Under R^-1(ohms^-1)
1.000, *0.500*, 0.333, 0.250, 0.200
Under V^-1(V^-1)
0.5263, 0.465, 0.4347, 0.4167, 0.400
Under R^-1/V^-1
1.900, 1.07, 0.768, 0.5999, 0.500
(3avi)
(i) Ensure tight connections.
(ii) Avoid error due to parallax when reading the voltmeter
(3b)
(i) Length of wire
(ii) Nature of wire
(3bii)
Total resistance,
R = 3 + (3×3)/(3+3)
R = 4.5 ohms
Current, I = V/R
I = 6/4.5
I = 1.33 A
